docs: def export(self, nidm_version, export_dir):
          """
          Create prov entities and activities.
          """
          if nidm_version['major'] < 1 or \
                  (nidm_version['major'] == 1 and nidm_version['minor'] < 3):
              self.type = NLX_OLD_FSL
  
          atts = (
              (PROV['type'], self.type),
              (PROV['type'], PROV['SoftwareAgent']),
              (PROV['label'], Literal(self.label, datatype=XSD_STRING)),
              (NIDM_SOFTWARE_VERSION, self.version)
              )
  
          if self.feat_version:
              atts = atts + ((FSL_FEAT_VERSION, self.feat_version),)
  
          self.add_attributes(atts)